Improvement in gage-cocks



UNITED STATES PATENT OFFICE.

JAMES CUMMING, OF JERSEY CITY, NEW JERSEY.

IMPROVEMENT IN GAGE-COCKS.

Specification forming part of Letters Patent No. 157,583, dated December 8, 1874; application filed May l2, 1874.

To all whom it may concern:

Be it known that I, JAMES GUMMING, of Jersey City, in the county `of Hudson and State of New Jersey, have invented an Improvement in Gage-Cocks, of which the following is a specification:

This invention relates to that class of gagecocks in which, by means of a pipe attached to the revolving plug or spindle of the cock,

' and bent or set at an angle to the axis thereof,

a single cock is enabled, by turning its plug or spindle, to serve the purpose of ascertaining the level of the water in a boiler.

This invention consists in forming the shell of the stop-cock'with a boss, into which is itted a screw-plug, the shell, the boss, and the screw-plug having an oblique passage through the same, to the lower end of which is secured a straight pipe, so that it will be brought to a position in line with the said oblique passage, whereby a straight wire can be passed through said passage, and through the straight pipe, with ease and facility, for the purpose of cleaning the same-a result which cannot be effected if a curved pipe be used, for a flexible wire would have then to be employed. 4

In the accompanying drawing, Figure l is a central vertical section of a gage-cock: embodying my improvements. Fig. 2 is a side elevation. d

A represents the shell of the cock, provided with a screw-thread on its inner portion for attaching it to the boiler B. On the upper side of the shellAis a boss, A', through which is formed an oblique passage, a, communicating with the center cavity or bore of the shell. Into this boss is screwed a socket, O, which forms a continuation of the passage a, and into the outer end of which is screwed a screwthreaded plug, D, provided with a handle, d,` for turning it. The inner end of the plug D is made conical to form a valve, o, and ts in a corresponding seat in the socket G, near which seat is an orifice, c, which allows the steam or water to escape when the plug D is unscrewed to remove the valve from its seat, and which is closed when the plug is screwed up to its seat, as shown in Fig. l.

The shell A has running axially through it the revolving plug or spindle E, on the outer end of which is a lever, f, which serves as a handle, and also as an indicator. The inner end of this revolving plug or spindle is bent and bored out, so as to form a passage, e, which will form a continuation of the passage a ofthe shell when in line therewith. To the inner end of the bent portion is attached a pipe, G, which forms a prolongation of the pipe ein the plug or spindle to a sufficient length to reach the various levels of the surface of the water. The inner end of the plug or spindle E is enlarged in valvular form, as shown at t, Fig. l, to fit to a seat, which may be either conical or of rabbet form in the inner end ofthe shell, and the outer end is provided with a spring, g, between the lever f and the stuffing-box h, to prevent an accidental longitudinal movement of the plug or spindle. At the point where the passage e meets the passage a in the shell the spindle E has a groove, l, on its periphery, forming a continuous channel or chamber for the passage of steam or water, so that, when the shaft E is turned to bring the passage e out of line with the passage a, there will still be a continuous communication between the.

passages e and a, and the water or steam is allowed to pass freely through the same when the valve '1 1 is open. The shaft E is turned by means of the handle f, so` as to bring the inner end of the pipe Gr to any desired level7 in order to ascertain the height of water in the boiler.

When it is desired to clear out the passages a e the plug D is to be entirely removed, and the passage may then be cleared of any obstruction which may exist by turning the spindle E to a position to bring its pipe G and `passage e in line with the passage a of the verse plug, with a pssage through it like the l substantially as described, whereby the pipe plus` of a stopcock. is brought in line with the passages@ e, as

What I claim as new, and desire to secure l herein shown', for the purposes specified.

by Letters Patent, is JAMES CUMMING.

The boss A', socket C, plug D, and the shell Witnesses.:

A, in combination With the oblique passages l BENJ. W. HOFFMAN, a e, shaft E, groove Z, and straight pipe Gr, l FRED. HAYNES. 

